Answer:
Explanation:
Let the radius of the neutron star be R.
Its surface ares a will be 4ĻR² . Let the thickness required be t .
The volume of the envelop Ā of Ā thick shell
4ĻR² t .This must be the volume of the sphere
= 4/3 ĻR³
mass = 4/3 ĻR³ Ļ where Ā Ļ is the density of the star. Ā Ļ will also be density of shell's envelop. So mass of envelop
= 4ĻR² t .
Given that
mass of envelop Ā = mass of the earth
4ĻR² t Ļ = Ā 4/3 ĻR³ Ļ
R = 3t